Dr. Eric Tjonahen, MD
- Industry payments
- $175
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2008
- Practice address
- 100 Morse Street, Norwood, MA 02062
- Practice phone
- Call (781) 255-0362
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Eastern Massachusetts Surgery Center
Surgery Center - Medicare-Certified · Norwood, Massachusetts
Find Dr. Tjonahen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Eric Tjonahen is a pediatrician in Norwood, Massachusetts
Dr. Tjonahen practices at Eastern Massachusetts Surgery Center in Norwood, Massachusetts.
Dr. Tjonahen's NPI, 1558523019, was assigned on June 26, 2008. Dr. Tjonahen holds Rhode Island license LP01362.
- NPI
- 1558523019NPI Registry (opens in a new tab)
- NPI enumeration date
- June 26, 2008
- NPI status
- Active
- Practice phone
- (781) 255-0362
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Eric Tjonahen practices at Eastern Massachusetts Surgery Center in Norwood, Massachusetts
Dr. Tjonahen's primary practice is Eastern Massachusetts Surgery Center, at 100 Morse Street, Norwood, MA 02062. The practice phone is (781) 255-0362.
- Eastern Massachusetts Surgery Center100 Morse Street, Norwood, MA 02062Phone(781) 255-0362
Source: Dmand AI Affiliation Data
Dr. Eric Tjonahen is affiliated with 1 site of care
Dr. Tjonahen's primary practice is Eastern Massachusetts Surgery Center in Norwood, Massachusetts.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Eric Tjonahen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tjonahen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Eastern Massachusetts Surgery Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Eric Tjonahen is one of 2,101 pediatricians in Massachusetts
Pediatrics is Dr. Tjonahen's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Tjonahen is licensed in Rhode Island.
Specialties and state licenses
- Pediatrics, Rhode IslandPrimary
Pediatricians near Dr. Tjonahen
Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Eric Tjonahen's patients have a median age of 11
Across all payers, Dmand AI patient panel data puts Dr. Tjonahen's median patient age at 11, with 40% women.
Dr. Tjonahen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 11
Patient panel by sex, all payers
- Women40%
- Men59%
Source: Dmand AI Patient Panel Data
Dr. Eric Tjonahen received $175 in industry payments from 2019 to 2025
CMS Open Payments shows 9 general payments to Dr. Tjonahen from 5 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $102.
General payments to Dr. Tjonahen by program year, 2019 to 2025
Companies that paid Dr. Tjonahen the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Eric Tjonahen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Eric Tjonahen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Eric Tjonahen's NPI number?
Dr. Eric Tjonahen's NPI number is 1558523019. It was assigned on June 26, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Eric Tjonahen?
Dr. Eric Tjonahen is a pediatrician in Norwood, Massachusetts. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Eric Tjonahen practice?
Dr. Tjonahen practices at 100 Morse Street, Norwood, MA 02062. Dr. Tjonahen's primary practice is Eastern Massachusetts Surgery Center in Norwood, Massachusetts.
What is Dr. Eric Tjonahen's office phone number?
The practice phone on file for Dr. Tjonahen is (781) 255-0362.
What is Dr. Eric Tjonahen's medical license number?
Dr. Tjonahen holds Rhode Island license LP01362.
Has Dr. Eric Tjonahen received payments from drug or device companies?
CMS Open Payments shows $175 in general payments to Dr. Tjonahen from 5 companies from 2019 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Eric Tjonahen been practicing?
Dr. Tjonahen's NPI was assigned in 2008.
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